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| author | Erik Verbruggen <erikjv@me.com> | 2014-03-27 11:16:05 +0000 |
|---|---|---|
| committer | Erik Verbruggen <erikjv@me.com> | 2014-03-27 11:16:05 +0000 |
| commit | 668c2aa51740da56f26a7488348362916fc77b2c (patch) | |
| tree | 3e2d62ac54468fc0bb064a17451ea2d84ae5490b /lib/Target/README.txt | |
| parent | 5fa6dffd30c24f82a615cf7d2e17252974c4b4eb (diff) | |
| download | llvm-668c2aa51740da56f26a7488348362916fc77b2c.tar.gz llvm-668c2aa51740da56f26a7488348362916fc77b2c.tar.bz2 llvm-668c2aa51740da56f26a7488348362916fc77b2c.tar.xz | |
InstCombine: merge constants in both operands of icmp.
Transform:
icmp X+Cst2, Cst
into:
icmp X, Cst-Cst2
when Cst-Cst2 does not overflow, and the add has nsw.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204912 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/README.txt')
| -rw-r--r-- | lib/Target/README.txt | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index a9aab86abd..4ecacf9d01 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -930,18 +930,6 @@ optimized with "clang -emit-llvm-bc | opt -std-compile-opts". //===---------------------------------------------------------------------===// -int g(int x) { return (x - 10) < 0; } -Should combine to "x <= 9" (the sub has nsw). Currently not -optimized with "clang -emit-llvm-bc | opt -std-compile-opts". - -//===---------------------------------------------------------------------===// - -int g(int x) { return (x + 10) < 0; } -Should combine to "x < -10" (the add has nsw). Currently not -optimized with "clang -emit-llvm-bc | opt -std-compile-opts". - -//===---------------------------------------------------------------------===// - int f(int i, int j) { return i < j + 1; } int g(int i, int j) { return j > i - 1; } Should combine to "i <= j" (the add/sub has nsw). Currently not |